Maitreya says that the Lord Yama, who restrains beings, was born by the curse of Mandavya: 'mANDavya-shApAd bhagavAn prajA-saMyamano yamaH' (SB 3.5.20). This is the only mention of Mandavya in this Skandha, and the curse is the ground on which he is identified.
Mandavya
माण्डव्य
Mandavya is the sage by whose curse the birth of Yama is accounted. At SB 3.5.20 Maitreya tells Vidura: 'mANDavya-shApAd bhagavAn prajA-saMyamano yamaH / bhrAtuH kShetre bhujShyAyAM jAtaH satyavati-sutAt' — the Lord Yama, who restrains beings, was born by the curse of Mandavya, in the field of his brother, of a bondwoman, from the son of Satyavati. This is the only mention of Mandavya in the third Skandha; the Bhagavata does not retell the story of the curse here, only names its effect as the cause of the birth.
Śrīmad Bhāgavata Mahāpurāṇa 3.5.20 — Sanskrit Wikisource (pinned chapter page; Devanagari from the cross-validated transcription in validation/sanskrit_skandha3.json)